4 ms·

At least here in the UK you can get UK rock salt, which I'd expect to be free of microplastics - it's mined from under the ground where it's been sitting for ae

At least here in the UK you can get UK rock salt, which I'd expect to be free of microplastics - it's mined from under the ground where it's been sitting for aeons, so unless the processing introduces microplastics (seems unlikely) I'd expect it to be pure.

semi-extrinsic 8y ago
TFA indicates rock salt also contain microplastics. If you're really paranoid, I'd suggest buying salt with sizeable crystals, and then rinse those in a saturated salt water bath. It seems to me these microplastics are not included in the salt grains, but rather dispersed among them. So they would float up. You could also check for microplastics in the salt you usually buy. Just dissolve 100g in 10L of water, and filter that through a dark finely woven cloth.
- thfuran 8y ago
  I'd rather melt the salt to take care of any infiltrating plastics.
  - rbanffy 8y ago
    That's very energy intensive. I hope your source of heat is carbon neutral.
  - sp332 8y ago
    I think the plastics would burn well before you got to the melting point of salt.
- Reason077 8y ago
  In the case of sea salt, doesn’t the salt crystal form around a seed particle? The plastic particles are seeding the crystal, so do end up “inside” the grains.
- docker_up 8y ago
  Microplastics are already in the water supply. And they are microns large, so filtering it in cloth is useless.
  - DrJaws 8y ago
    that's why anyone should install a osmosis filter at home